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W. &- T. G. OVENS. Meat Mincing Machine.

No. 235,561. Patented Dec. 14,1880.

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N. FEI'ERS. PHOTO-LITHOGRAPHER. WASHINGTON, D C

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No. 235,561. Pat ente'd'Dec. 14,1880.

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3 Sheets-Sheet 3.

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W. 85 T. C. OVENS. Meat Minding Machine.

No. 235,561. Patenfed Dec. 14, 188 0.

.project above the knife-table O. an openingin the knife-table throughwhich UNITED STATES PATENT @FFICE.

WILLIAM OVENS AND THOMAS (LOVENS, OF OLERKENWELL, ENGLAND.

MEAT-MINCING MACHINE.

SPECIFICATION forming part of Letters Patent No. 235,561, dated.December 14, 1880.

Application filed September 18, 1880. (No model.) Patented in EnglandJuly 21, 1879.

To all whom it may concern.-

Be it known that we, WILLIAM OVENS and THOMAS CHARLES OVENS, ofClerkenwell, in the county ofMiddlesex, England, (en gineers,) haveinvented new and useful Improvements in Machines for Mincing 'Meat,which improvements are fully set forth in the following specification,reference being had to the accompanyin g drawings.

Our invention relates to that class of machines for mincing meat inwhich the meat is cut by knives carried by a rotatory shaft and workingin a rotatory bowl, the said shaft and bowl rotating in planes at rightangles to each other.

Figure 1 of the accompanying drawings is an elevation; Fig. 2 a plan,and Fig. 3 a vertical section, taken on the line 1, Fig. 2, of a machinefor mincing meat constructed according to our invention. Figs. 4 and 5are details, hereinafter referred to.

The same letters and figures of reference indicate the same parts in theseveral figures of the drawings.

A is the rotatory bowl, on the under side of which is formed a socket,a.

B is the base-plate, to which a rod or shaft, 11, is secured by means ofa nut, 12 which takes onto a screw, b on the ,said'rod. The socket a onthe bowl A fits over the rod 1), which forms the axis on which the saidbowl rotates. a is a worm-wheel keyed on the socket on. I

A* is the main shaft, working in bearings a a and carrying fast andloose pulleys a a a fly-wheel, a and a worm, a", which gears with theworm-wheele b b b b are standards, which are secured to the base-plateby means of screw-nuts b I), which engage with screw-threads b" 11formed on the lower ends of the said standards.

0 is a table, which we term the knife-table, supported by the saidstandards, one side of the said table being hinged to the standards b bat c c, and the other side being secured by means of nuts 11 I), whichscrew onto the upper ends of the standards b I), which 0, Fig. 2, is

the meat may be withdrawn from or fed into the bowl while the machine isin action. The

knife-table may be readily freed from the standards for remova-Lwhennecessary, by un- I the upper part of thebowl may be regulated.

D D are shafts mounted in bearings d d on the knife-table, and E E E Eare knives carried by the said shafts, which knives have slots 6 6 (seeFigs. 3 and 5) formed in them, through which the shafts on which theyare mounted are passed. (1 d are shoulders or abutments formed on theshafts D D, against which shoulders or abutments the knives E E bear. dd are collars or tubes by which the pairs of knives are kept apart, andcl d are screw-collars or nuts by which the knives are locked in theirplaces, the said nuts (I (Z engaging with screwthreads d d formed on thesaid shafts and bearing against Washers d d", whichbear against theknives E E. Those parts of the shafts D D on which the knives aremounted are flattened, as shown in Fig. 3, in order to prevent theknives from turning thereon.

The arrangement hereinbefore described for securin g the knives admitsof their being readily adjusted when they become worn, the adjustm entbeing effected byloosening the screwnuts (1 d and sliding the knives onthe shafts in the direction of the length of the slots. When the knivesare adjusted they are again secured in the position to which they havebeen brought by screwing up the nuts (1 61 \Ve prefer to arrange theknives on their shafts, as illustrated in Fig. 5 of the accompanyingdrawings, which is a transverse section of one of the shafts, showing apair of knives secured thereto.

61 d are india-rubber-faced drums keyed on the knife-shaft D D, and d ispulley keyed IOO site directions, whereby vibration of the machine whenit is in action is avoided. The directions in which the drums and knivesand bowl revolve when the machine is in action are indicated by thearrows in Figs. 2 and 3.

F F are fixed cutters, secured, by screws f f, to the underside of theknife-table O, at the sides of the slot in which the knives E E E Ework.The holes in the said cutters through which the screwsff pass, areslotted, so as to admit of the cutters being very accurately adjustedwhen their edges become worn.

c c are plates screwedto the knife-table G, and nearly closing thespaces between the knives E E E E, to the under sides of which platesother cutters, F F, are secured, so as to be capable of adjustment inthe same manner as the cutters F F.

The arrangement of the knives or cutters F F F F and plates 0 is clearlyshown in Fig. 4, which is a section of part of the knife-table, taken onthe line 2, Fig. 2.

b is a screw, which takes into a screwed hole formed into the upper endof the rod 1), the under side of the head of which screw bears on theupper face of a collar or washer, b, which keeps the bowl A in itsplace. To'provide for the lubrication of the bearing of the said bowlholes I) b are drilled in the said rod 1), into which holes oil may bepoured when the screw [1 is removed.

G G are guards or covers, screwed to thetable 0, over the slotsin whichtheknives work. These guards or covers prevent the meat from beingthrown out of the machine when itisin action.

H is a plate or scraper secured to the knifetable (I by means of abutton, h, provided with a lever-handle, 7B, which bears upon a tang, hformed on the said scraper, and having holes formed in it, which engagewith pins or studs h h, the heads of which project from the face of thetable (J. The said plate or scraper projects into and lies nearlyincontact with the inner side of the bowl.

When the machine is in action the plate or scraper H, as the bowlrotates, causes the meat (which by the action of the knives has beencollected on the sides of the bowl) to be detached therefrom, and tofall toward the middle of the bowl, whereby the meat is thoroughlyexposed to the action of the knives, and

the meat does not require to be turned over and mixed by hand, as inordinary machines.

In order to ascertain if the meat has been sufficiently minced, portionsof it may be removed from the bowl at the uncovered part withoutstopping the machine. When it is found that the meat has beensufficiently minced the screws 1) b are removed, and the knife-table Ois turned back on its joint or hinges c c. The bowl is thus uncoveredand the meat may be removed, or the meat may be removed from the bowl atthe uncovered part,

and the bowl may be recharged without stopping the machine.

If it be preferred to mix the meat by hand, the blade H may be liberatedby turning aside the button h, and may then be lifted off the studs hit.

When in use the machine is secured to a bench or table by bolts passedthrough the base-plate B.

We prefer to coat the interior of the bowl and the under side of theknife table with enamel, so that the meat may not be injured by contactwith the said parts.

Although we prefer to mount two knives on each shaft and to use twoshafts, a greater or less number of knives may be mounted on the saidshafts; and instead of two shafts one only may be used.

Having now described the nature of ourinvention of improvements inmachines formincing meat and the manner in which it is to be performed,we wish it to be understood that we do not limit ourselves to theprecise details hereinbefore described, as they may be varied withoutdeparting from the nature of our invention; but

We claim as our said invention 1. A machine for mincing meat comprisingthe following elements, in combination: two horizontal shafts rotatingin opposite directionsiand carrying knife blades or cutters, a rotarybowl in which the meat is minced by the action of said knives,stationary cutters attached to the under side of the knife-table of saidmachine, and a scraper also attached to said knife-table, substantiallyas described.

2. In a machine for mincing meat, the stationary or fixed cuttersadju'stably secured to the under side of the knife-table of saidmachine, substantially as described.

3. In a machine for mincing meat having a rotary bowl and rotary cuttersor knives, the combination, with said rotary cutters orknives, of fixedcutters secured to the under side of the knife table on the edges of theslots through which said rotary cutters pass, substantially asdescribed.

4. The combination, in a meat-mincing machine, of two shafts rotating inopposite directions, each shaft carrying two knives adjustably securedthereto, a rotary bowl with stationary cover, which forms theknife-table of said machine, and which carries the bearings of saidshafts, and stationary cutters or knives secured on the under side ofsaid knifetable and adapted to co-operate with said rotary cutters,substantially as described.

WILLIAM OVENS. [L. THOMAS CHARLES OVENS. [L. S. Witnesses:

WILLIAM THOMAS WHITEMAN,

7 Staple Inn, London. EDWIN Bron, v

71 Oornht'll, London, Notarys Clerk.

